LOS ANGELES, Calif. (CNN) -- Sotheby's will be auctioning the largest round diamond ever presented at auction next month.

The 110 carat diamond is expected to sell for $4 to $6 million.

The stone went on display in Los Angeles on Monday.

"It's not every day you see a hundred carat diamond. I mean, the reality is that the vast majority of diamonds ever mined are under one carat, and so, you can sort of count on two hands the number of hundred-carat diamonds that have ever been sold at auction, and this is the single largest round one that's ever been offered," said Quig Bruning, Sotheby's Jewelry Specialist.